FAR 21.331 — Export Airworthiness Approvals
FAR 21.331 explains how the FAA issues export airworthiness approvals for new and used aircraft engines, propellers, and articles, including allowed deviations.
FAR 21.331 governs how the FAA issues export airworthiness approvals for aircraft engines, propellers, and articles (parts) being shipped to another country.
For new engines, propellers, or articles manufactured under Part 21, the FAA can issue an export approval if the item:
- Conforms to its approved design, and
- Is in a condition for safe operation.
For used engines, propellers, or articles, the same two requirements apply.
The rule allows deviations from these requirements only if:
- The importing country or jurisdiction accepts the deviation in a form and manner acceptable to the FAA, and
- The export approval lists the deviation as an exception, documenting any difference from the approved design.
Note that the deviation provision for used items applies specifically to engines and propellers, not articles. Operationally, this matters because export approvals support international trade in aviation parts while ensuring the receiving country knows exactly what it is accepting and any non-conforming differences are clearly documented.